Liquid crystal display apparatus having high definition

Abstract

A liquid crystal display apparatus includes first and second transparent substrates having optical anisotropy, a super twisted nematic liquid crystal body including liquid crystal molecules, an orientation device configured to urge the liquid crystal molecules to orient in a first direction in the inner surface of the first transparent substrate and in a second direction in the inner surface of the second transparent substrate, at least one phase retarder plate and at least one polarizing plate, wherein an angle between an absorption axis of the at least one polarizing plate and a direction of the largest refraction index of the at least one phase retarder plate adjacent to the at least one polarizing plate is 45°±22.5°, an angle between an absorption axis of the at least one polarizing plate and an orientation direction of the liquid crystal molecules in the inner surface of the second substrates adjacent to the polarizing plate is 45°±22.5°, a retardation value of the first and second substrates is less than 50 nm, an angle between a direction of the largest refraction index of the first substrate and an orientation direction of the liquid crystal molecules in the inner surface of the first substrate is within the range of −40° to 40°, and an angle between a direction of the largest refraction index of the second substrate and an orientation direction of the liquid crystal molecules in the inner surface of the second substrate is within a range of 50° to 130°.

What is claimed is:  
     
       1. A liquid crystal display apparatus comprising: 
       first and second transparent substrates having optical anisotropy, said first and second transparent substrates being spaced apart substantially in parallel to each other to form a gap therebetween;  
       a super twisted nematic liquid crystal body comprising liquid crystal molecules and filling the gap between said first and second transparent substrates;  
       an orientation layer configured to urge said liquid crystal molecules of said super twisted nematic liquid crystal body to orient in a first direction in an inner surface of said first transparent substrate and in a second direction in an inner surface of said second transparent substrate, the first direction being more than 90° to said second direction;  
       at least one phase retarder plate disposed parallel to said first and second transparent substrates and outside the first or second transparent substrate; and  
       at least one polarizing plate disposed parallel to said first and second transparent substrates and outside the first or second transparent substrate,  
       wherein  
       an angle between an absorption axis of said at least one polarizing plate and a direction of the largest refraction index of said at least one phase retarder plate disposed adjacent to the at least one polarizing plate is 45°±22.5°;  
       an angle between an absorption axis of said at least one polarizing plate and an orientation direction of the liquid crystal molecules in the inner surface of said second transparent substrate adjacent to the at least one polarizing plate is 45°±22.5°;  
       a retardation value of said first and second transparent substrates is less than 50 nm;  
       an angle between a direction of the largest refraction index of said first transparent substrate and an orientation direction of the liquid crystal molecules in the inner surface of the first transparent substrate is within a range of −40° to 40°; and  
       an angle between a direction of the largest refraction index of the second transparent substrate and a direction perpendicular to the orientation direction of the liquid crystal molecules in the inner surface of the second transparent substrate is within a range of −40° to 40°.  
     
     
       2. The liquid crystal display apparatus of claim  1 , wherein 
       an angle between said direction of the largest refraction index of said first transparent substrate and said direction of the largest refraction index of the second transparent substrate is almost 90°;  
       the liquid crystal display apparatus has a rectangular form; and  
       said direction of the largest refraction index of the first transparent substrate is parallel to one side of the rectangular form.  
     
     
       3. The liquid crystal display apparatus of claim  1  or  2 , wherein 
       said direction of the largest refraction index of said first transparent substrate is substantially parallel to said direction of the largest refraction index of the second transparent substrate.  
     
     
       4. A liquid crystal display apparatus comprising: 
       first and second transparent substrates having optical anisotropy, said first and second transparent substrates being spaced apart substantially in parallel to each other to form a gap therebetween;  
       a super twisted nematic liquid crystal body comprising liquid crystal molecules and filling the gap between said first and second transparent substrates;  
       an orientation layer configured to urge said liquid crystal molecules to orient in a first direction in an inner surface of said first transparent substrate and in a second direction in an inner surface of said second transparent substrate, the first direction being more than 90° to said second direction;  
       at least one phase retarder plate disposed parallel to said first and second transparent substrates and outside the first or second transparent substrate; and  
       at least one polarizing plate disposed parallel to said first and second transparent substrates and outside the first or second transparent substrate,  
       wherein  
       an angle between an absorption axis of said at least one polarizing plate and a direction of the largest refraction index of said at least one phase retarder plate disposed adjacent to the at least one polarizing plate is 45°±22.5°;  
       an angle between an absorption axis of said at least one polarizing plate and an orientation direction of the liquid crystal molecules in the inner surface of said second transparent substrate adjacent to the at least one polarizing plate is 45°±22.5°;  
       a retardation value of said first and second transparent substrates is 20 nm and less;  
       an angle between a direction of the largest refraction index of said first transparent substrate and an orientation direction of the liquid crystal molecules in the inner surface of the first transparent substrate is within a range of −30° to  30°; and    
       an angle between a direction of the largest refraction index of the second transparent substrate and a direction perpendicular to the orientation direction of the liquid crystal molecules in the inner surface of the second transparent substrate is within a range of −30° to 30°.  
     
     
       5. The liquid crystal display apparatus of claim  4 , wherein 
       an angle between said direction of the largest refraction index of said first transparent substrate and said direction of the largest refraction index of the second transparent substrate is almost 90°;  
       the liquid crystal display apparatus has a rectangular form; and  
       said direction of the largest refraction index of said first transparent substrate is parallel to one side of the rectangular form.  
     
     
       6. The liquid crystal display apparatus of claim  4 , wherein 
       said direction of the largest refraction index of said first transparent substrate is substantially parallel to said direction of the largest refraction index of the second transparent substrate.